add_subdirectory(stdio)
add_subdirectory(stdlib)
add_subdirectory(string)
add_subdirectory(unistd)
add_subdirectory(signal)
add_subdirectory(time)
add_subdirectory(fcntl)
add_subdirectory(stdarg)
add_subdirectory(socket)
add_subdirectory(pthread)
add_subdirectory(sys)
add_subdirectory(ctype)
add_subdirectory(setjmp)
add_subdirectory(libgen)